Calculators & Formulas
SMV (Standard Minute Value)
Formula: SMV = Basic Time × (1 + Allowance%)
Where:
- Basic Time = Observed Time × Performance Rating
- Allowance% = typically 30% (personal + fatigue + delay)
Free Tools
Quick Code Example
const { calculateSMV } = require('garment-smv-calculator');
const smv = calculateSMV({
observedTimeSeconds: 18,
performanceRating: 1.05,
allowancePercent: 0.30,
});
// → 0.41 minutes per piece
Piece-Rate Wage
Formula: pieces × rate × skill multiplier + machine bonus + efficiency bonus − quality penalty
Free Tools
Quick Code Example
const { calculatePieceRate } = require('garment-piece-rate');
const wage = calculatePieceRate({
pieces: 250,
ratePerPiece: 2.50,
skillLevel: 'expert',
qualityScore: 95,
efficiencyPercent: 110,
machineType: 'OVERLOCK_5THREAD',
});
// → { gross: 906.95, breakdown: {...} }
Bundle ID
Format: STYLE-LOT-COLOR-SIZE-BUNDLE#-COMPONENT
Example: S27-8082-BLUE-M-001-FRT
Free Tools
Quick Code Example
const { generateBundleId, parseBundleId } = require('garment-bundle-id');
const id = generateBundleId({
style: 'S27', lot: '8082', color: 'BLUE',
size: 'M', bundleNumber: 1, component: 'FRT'
});
// → "S27-8082-BLUE-M-001-FRT"
Read full QR bundle tracking guide →